Design of Novel Multilayer Microwave Coupled-line Structures Using Thick-film Technology

Design of Novel Multilayer Microwave Coupled-line Structures Using Thick-film Technology

Author:

Publisher:

Published: 2001

Total Pages:

ISBN-13:

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A novel octave band DC block (2.5 -10.5GHz) and a broadband 3dB directional coupler (3-8GHz) have been designed, fabricated and tested using a new multilayer format. The multiple layers of thick-film dielectric and metal were printed on an alumina base and an etching technique used to form the final conductor pattern. The tight coupling required between the coupled lines was realized by overlapping these lines in a multilayer structure. Very good agreement was obtained between measured and simulated data. The results demonstrate that multilayer thick-film techniques provide an efficient method of achieving small size, low cost components having good microwave performance. In particular, the new multilayer approach has been shown to overcome the problem of fabricating very small gaps between coupled lines in a traditional single layer structure.


Fiber Optic Sensors

Fiber Optic Sensors

Author: Ignacio R. Matias

Publisher: Springer

Published: 2016-11-01

Total Pages: 379

ISBN-13: 3319426257

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This book describes important recent developments in fiber optic sensor technology and examines established and emerging applications in a broad range of fields and markets, including power engineering, chemical engineering, bioengineering, biomedical engineering, and environmental monitoring. Particular attention is devoted to niche applications where fiber optic sensors are or soon will be able to compete with conventional approaches. Beyond novel methods for the sensing of traditional parameters such as strain, temperature, and pressure, a variety of new ideas and concepts are proposed and explored. The significance of the advent of extended infrared sensors is discussed, and individual chapters focus on sensing at THz frequencies and optical sensing based on photonic crystal structures. Another important topic is the resonances generated when using thin films in conjunction with optical fibers, and the enormous potential of sensors based on lossy mode resonances, surface plasmon resonances, and long-range surface exciton polaritons. Detailed attention is also paid to fiber Bragg grating sensors and multimode interference sensors. Each chapter is written by an acknowledged expert in the subject under discussion.


Proceedings

Proceedings

Author:

Publisher: Information Gatekeepers Inc

Published: 1991

Total Pages: 554

ISBN-13: 9783905084016

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Photonic Microresonator Research and Applications

Photonic Microresonator Research and Applications

Author: Ioannis Chremmos

Publisher: Springer

Published: 2010-06-09

Total Pages: 515

ISBN-13: 1441917446

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The technology surrounding the design and fabrication of optical microresonators has matured to a point where there is a need for commercialization. Consequently, there is a need for device research involving more advanced architectures and more esoteric operating principles. Photonic Microresonator Research and Applications explores advances in the fabrication process that enable nanometer waveguide separations, exceptionally smooth surfaces essential to reach Q factors in the order of 106- 108 and high index contrast materials.